Problem creating DLL for CINs

[srini]

I am just learning on how to use CINs in LV. I am facing some problem in
creating
the DLL in Visul C++ IDE.
My cintools directory is D:\National Instruments\LabVIEW 7.0\cintools
In the project->settings->custom build->commands field, I have enterd the
following: D:\National Instruments\LabVIEW 7.0
\cintoolslvsbutil.exe "$(TargetName)" -d"$(WkspDir)\$(OutDir)"
When I build the dll, the error displayed is:
'D:\National' is not recognised as an internal or external command, operable
program or batch file. Error executing C:\Winnt\System32\cmd.exe

Please help me .

Thanks & Regards,
Srini.

[Lycangeek]

Looks like the batch file needs the quotes for the space in the path. You would need something like

"D:\National Instruments\LabVIEW 7.0\cintoolslvsbutil.exe" "$(TargetName)" -d"$(WkspDir)\$(OutDir)"

If you don't mind, can I ask why you are using CINs? We have put a lot of features in LabVIEW to try to eliminate most of the reasons people used to develop CINs. It may be that there is a better and easier way to accomplish what you are trying to do.

[Enrique]

Srini;

You can also use this little VI I created to perform the custom step:

CIN Custom Step

It is in LabVIEW, so it will be easier for you to edit and customize.

Regards;
Enrique

[srini]

Hi,
I wanted to use CINs for my DAQ program. I have a custom built PCI DAQ card.Till now I was using a C program. Now I am switching to LabVIEW. I tried using the inport.vi and outport.vi but it is very slow. That's why I thought I can use my C program in LabBIEW and see whetherit will work as fast as the C program. Any comments will be of great help.

[srini]

I am using LabVIEW 7.0. Can I use your vi for this version also?

[srini]

I enclosed the path in quotes.The error displayed is: "Error executing c:\winnt\system32\cmd.exe
Can you help me?

[Lycangeek]

If you are primarily trying to just call a C library which interfaces with your hardware, then I definately suggest going with the DLL path rather than CIN. It is much easier to build and maintain.

I really good starting point in terms of designing your C API for LabVIEW is to consider what kind of data you will be passing back and forth. I recommend downloading this example and looking over it. Let me know if you have any questions.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E78F56A4E034080020E74861

Note that it isn't a CIN, even though it does make use of the extcode.h and certain calls into LabVIEW. It is just one DLL calling into another.

[Enrique]

Yes. If for some reason you have problems let me know.

[srini]

This works veryfine. Thanks a lot.